mirror of
https://github.com/0ldsk00l/nestopia.git
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131 lines
4.2 KiB
C++
131 lines
4.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////
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//
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// Nestopia - NES/Famicom emulator written in C++
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//
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// Copyright (C) 2003-2008 Martin Freij
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//
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// This file is part of Nestopia.
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//
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// Nestopia is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Nestopia is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Nestopia; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#include "NstBoard.hpp"
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#include "NstBoardMmc3.hpp"
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#include "NstBoardGouder.hpp"
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namespace Nes
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{
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namespace Core
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{
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namespace Boards
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{
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namespace Gouder
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{
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("s", on)
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#endif
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void G37017::SubReset(const bool hard)
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{
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if (hard)
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{
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regs.select = 0;
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for (uint i=0; i < 4; ++i)
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regs.buffer[i] = 0;
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}
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Mmc3::SubReset( hard );
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Map( 0x4800U, 0x4FFFU, &G37017::Poke_4800 );
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Map( 0x5000U, 0x57FFU, &G37017::Poke_5000 );
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Map( 0x5800U, 0x5FFFU, &G37017::Peek_5800, &G37017::Poke_5800 );
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}
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void G37017::SubLoad(State::Loader& state,const dword baseChunk)
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{
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if (baseChunk == AsciiId<'G','D','R'>::V)
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{
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while (const dword chunk = state.Begin())
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{
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if (chunk == AsciiId<'R','E','G'>::V)
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{
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state.Read( regs.buffer );
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regs.select = state.Read8();
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}
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state.End();
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}
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}
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}
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void G37017::SubSave(State::Saver& state) const
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{
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state.Begin( AsciiId<'G','D','R'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write( regs.buffer ).Write8( regs.select ).End().End();
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}
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("", on)
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#endif
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void NST_FASTCALL G37017::UpdatePrg(uint,uint)
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{
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// controlled by $4800..$4FFF
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}
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NES_POKE_D(G37017,4800)
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{
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prg.SwapBank<SIZE_32K,0x0000>( (data & 0x1) | (data >> 3 & 0x2) );
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}
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NES_POKE_D(G37017,5000)
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{
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regs.select = data;
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}
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NES_POKE_AD(G37017,5800)
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{
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static const byte lut[256] =
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{
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x49,0x19,0x09,0x59,0x49,0x19,0x09,
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x51,0x41,0x11,0x01,0x51,0x41,0x11,0x01,
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x49,0x19,0x09,0x59,0x49,0x19,0x09,
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x51,0x41,0x11,0x01,0x51,0x41,0x11,0x01,
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0x00,0x10,0x40,0x50,0x00,0x10,0x40,0x50,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x08,0x18,0x48,0x58,0x08,0x18,0x48,0x58,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x10,0x40,0x50,0x00,0x10,0x40,0x50,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x08,0x18,0x48,0x58,0x08,0x18,0x48,0x58,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x58,0x48,0x18,0x08,0x58,0x48,0x18,0x08,
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x50,0x40,0x10,0x00,0x50,0x40,0x10,0x00,
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x58,0x48,0x18,0x08,0x58,0x48,0x18,0x08,
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0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x59,0x50,0x40,0x10,0x00,0x50,0x40,0x10,0x00,
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0x01,0x11,0x41,0x51,0x01,0x11,0x41,0x51,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x09,0x19,0x49,0x59,0x09,0x19,0x49,0x59,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x01,0x11,0x41,0x51,0x01,0x11,0x41,0x51,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x09,0x19,0x49,0x59,0x09,0x19,0x49,0x59,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
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};
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regs.buffer[address & 0x3] = data ^ lut[regs.select];
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}
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NES_PEEK_A(G37017,5800)
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{
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return regs.buffer[address & 0x3];
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}
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}
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}
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}
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}
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